. >>> tourists outside london's buckingham palace got a real surprise today. a man broke through a security cordon and held a large knife to his own neck. in second, police moved in, and that set off a brief confrontation. the man started waving the knife, running at one of the officers, the officer used a taser. the man dropped to the ground and was handcuffed and taken to a police station. >>> this time singer chris brown apparently won't face any civil or criminal charges. fellow singer frank ocean says brown jumped him leading to a brawl over a parking space a week ago at an l.a. recording studio. but ocean says he is dropping the matter. brown is already on five years' probation after assaulting his pop star girlfriend rihanna back in 2009. >>> the man who invented etch a sketch has passed away. french electrician andre cassagnes dreamed up the drawing toy in his garage back in 1950. etch a sketch's popularity got another boost when it appeared in the "toy story" movies. its magic screen is in the national toy hall of fame. cassagnes was 86 years old. >>>